JPH10216917A - Method for casting low melting point alloy core for intake manifold - Google Patents
Method for casting low melting point alloy core for intake manifoldInfo
- Publication number
- JPH10216917A JPH10216917A JP2547897A JP2547897A JPH10216917A JP H10216917 A JPH10216917 A JP H10216917A JP 2547897 A JP2547897 A JP 2547897A JP 2547897 A JP2547897 A JP 2547897A JP H10216917 A JPH10216917 A JP H10216917A
- Authority
- JP
- Japan
- Prior art keywords
- port
- mold
- tank
- gas vent
- intake manifold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車用インテー
クマニホールドの樹脂の射出成形に用いられる低融点金
属中子を成形するインテークマニホールド用低融点合金
中子の鋳造方法に係り、特に、鋳巣の発生や湯回り不良
を防止し、湯皺や湯境の少ない高品質の鋳造品を鋳造す
ることを目的としている。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for casting a low-melting alloy core for an intake manifold for molding a low-melting metal core used for injection molding of a resin for an intake manifold for an automobile. An object of the present invention is to prevent generation and poor running of a molten metal, and to cast a high-quality cast product with little wrinkles and hot water boundaries.
【０００２】[0002]
【従来の技術】従来、自動車用エンジンへガソリンを噴
射するインテークマニホールドを樹脂材料で射出成形す
る際の方法として、大径のタンク部とこれに略直角に分
岐して突出した小径の複数個のポート部とからなる形状
を有するインテークマニホールド用の中子を、たとえ
ば、Ｓｎ−Ｂｉ合金等の低融点合金で製作する方法があ
った。この場合、これらの低融点合金の溶湯を、ダイカ
ストマシンなどと同じ構造の型締装置に取り付けた金型
装置の金型キャビティへ射出して鋳造し、成形品として
製作していた。そして、このときの成形装置を横型締竪
鋳込型とした場合、金型装置の金型のキャビティは、図
３に示すように、タンク部を水平にした横置きの場合と
図５に示すように、タンク部を垂直にした縦置きの場合
の２つ場合があり、それぞれ、タンク部の下方に連なる
ランナ部より溶湯を射出するのが通例であった。2. Description of the Related Art Conventionally, as a method of injection-molding an intake manifold for injecting gasoline into an automobile engine using a resin material, a large-diameter tank portion and a plurality of small-diameter branch portions projecting at substantially right angles to the tank portion are known. There has been a method of manufacturing a core for an intake manifold having a shape including a port portion, for example, using a low melting point alloy such as a Sn-Bi alloy. In this case, the molten metal of these low melting point alloys is injected into a mold cavity of a mold device attached to a mold clamping device having the same structure as a die casting machine or the like, and is cast to produce a molded product. When the molding device at this time is a horizontal clamping vertical casting mold, the cavity of the mold of the mold device is, as shown in FIG. As described above, there are two cases in which the tank portion is vertically placed vertically, and in each case, it is customary to inject the molten metal from a runner portion connected below the tank portion.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
ように、横置きの場合には、ポート部の先端に接続して
設けられたガス抜き通路はそのまま各々上方へ伸びてい
るので射出時のガスの排出は良好であるけれども、大径
のタンク部に相当する金型キャビティが横拡がりとな
り、湯がランナ部からタンク部へ移行する場合、湯先の
断面積が急変し流れ方向が大きく変わるために湯先が波
立ち鋳造品に湯皺や湯境が発生し易い。一方、縦置きの
場合には、タンク部は垂直方向にあり下方から勢いよく
上昇してくる溶湯の流れに対して好都合であるが各々の
ポート部はほぼ水平に配列されているため、ポート部の
端部にあった空気の脱出が難しくここにエア溜まりが生
じ、溶湯の進入にともなってガスの巻き込みによる鋳巣
や湯回り不良が発生し易い。However, as described above, in the case of horizontal installation, the gas vent passages provided at the ends of the port portions extend upward as they are, so that the gas at the time of injection is Although the discharge is good, the mold cavity corresponding to the large-diameter tank part expands laterally, and when the hot water moves from the runner part to the tank part, the cross-sectional area of the hot tip changes suddenly and the flow direction changes greatly. The tip of the casting is wavy, and wrinkles and boundaries are easily generated in the cast product. On the other hand, in the case of the vertical installation, the tank portion is in the vertical direction, which is convenient for the flow of the molten metal which rises vigorously from below, but since each port portion is arranged substantially horizontally, the port portion is arranged. It is difficult for the air at the end to escape, and air is trapped here, and as a result of the intrusion of the molten metal, porosity and poor running around due to entrainment of gas are likely to occur.
【０００４】[0004]
【課題を解決するための手段】以上の課題を解決するた
めに、本発明においては、第１の発明では、自動車用エ
ンジンへガソリンを噴射する大径のタンク部と該タンク
部側面より略直角に分岐して突出した小径の複数個のポ
ート部とからなる形状を有するインテークマニホールド
を樹脂材料で射出成形する際に使用するインテークマニ
ホールド用低融点合金中子の鋳造方法であって、型締装
置に取り付けられた金型装置の両金型を、垂直な分割面
で分離した左右一対の金型で形成された横型締竪鋳込型
とし、該両金型に設けられた前記中子の金型キャビティ
を該分割面に対して該中子のポート部を水平方向に対し
て傾斜し、かつ、ポート先端部がポート部とタンク部の
接合部よりも高位置になるよう穿設して設け、該ポート
先端部の各々にそれぞれ接続して設けられたガス抜き通
路を設けるとともに、該タンク部の下方の一端より低融
点合金の溶湯を射出・加圧する構成とした。また、第２
の発明では、第１の発明において、タンク部の上端部に
接続して金型のガス抜き通路を設け、ポート先端部に接
続して設けられる金型のガス抜き通路は、該ポート部の
軸線方向に沿って直進させるか、もしくは、該ポート部
の軸線方向に沿っていくらか直進させた後に鉛直上方へ
屈曲させたガス抜き通路とした。According to a first aspect of the present invention, a large-diameter tank for injecting gasoline into an automobile engine is substantially perpendicular to the side of the tank. A method for casting a low-melting alloy core for an intake manifold used when injection molding an intake manifold having a shape comprising a plurality of small-diameter ports protruding from a resin material with a mold clamping device. The two dies of the die device attached to the mold are horizontal clamping vertical casting dies formed by a pair of left and right dies separated by a vertical dividing surface, and the core dies provided in the two dies are provided. A mold cavity is provided by inclining the port portion of the core with respect to the division surface with respect to the horizontal direction, and drilling the tip of the port at a position higher than the junction between the port portion and the tank portion. At each of the port tips. Provided with a gas vent passage which is provided with respective connections, and a configuration which applies an injection and pressurized to from the low melting point alloy melt end of the lower of the tank portion. Also, the second
According to the first aspect of the present invention, in the first aspect, a mold gas vent passage connected to the upper end of the tank portion is provided, and the mold gas vent passage provided to be connected to the front end of the port is provided with an axis of the port portion. The gas venting passage was made to go straight along the direction, or to go straight along the axial direction of the port part and then bent vertically upward.
【０００５】[0005]
【発明の実施の形態】本発明のインテークマニホールド
用低融点合金中子の鋳造方法は、両金型を、垂直な分割
面で分離した左右一対の金型で形成された横型締竪鋳込
型とし、該両金型に設けられた前記中子の金型キャビテ
ィを該分割面に対して該中子のポート部を水平方向に対
して傾斜し、かつ、ポート先端部がポート部とタンク部
の接合部よりも高位置になるよう穿設して設け、該ポー
ト先端部の各々にそれぞれ接続して設けられたガス抜き
通路を設けるとともに、該タンク部の下方の一端より低
融点合金の溶湯を射出・加圧するようにしたため、タン
ク部、ポート部とも斜め上方を向いた状態となるため、
溶湯の進入に伴なうガスの脱出が比較的容易であり、前
記した湯皺や湯境、鋳巣や湯回り不良の発生を防止でき
る。また、第２の発明では、タンク部の上端部に接続し
て金型のガス抜き通路を設け、ポート先端部に接続して
設けられる金型のガス抜き通路を、ポート部の軸線方向
に沿って直進させるか、もしくは、ポート部の軸線方向
に沿っていくらか直進させた後に鉛直上方へ屈曲させた
ガス抜き通路としたので、ガス抜きが円滑に行なわれ、
ガス抜き不良による鋳巣、湯回り不良が起こらない。BEST MODE FOR CARRYING OUT THE INVENTION The method of casting a low melting point alloy core for an intake manifold according to the present invention is directed to a horizontal clamping vertical casting mold formed by a pair of left and right dies separated by a vertical dividing surface. And the mold cavity of the core provided in both the molds, the port portion of the core is inclined with respect to the dividing surface with respect to the horizontal direction, and the tip of the port has the port portion and the tank portion. And a gas venting passage connected to each of the port tip portions, and a low melting point alloy melt from one end below the tank portion. Injecting and pressurizing, both the tank part and the port part become obliquely upward, so
It is relatively easy for the gas to escape due to the entry of the molten metal, and it is possible to prevent the occurrence of the above-described wrinkles, molten metal boundaries, casting cavities, and poor running around the molten metal. Further, in the second invention, a mold gas vent passage connected to the upper end portion of the tank portion is provided, and the mold gas vent passage provided to be connected to the port tip portion is provided along the axial direction of the port portion. Or straight forward along the axis of the port part and then bent vertically upwards, so that the gas vent passage is smoothly vented.
Poor porosity and poor run-off due to poor venting.
【０００６】[0006]
【実施例】以下図面に基づいて本発明の実施例の詳細に
ついて説明する。図１〜図２はいずれも本発明の実施例
に係る金型状態を示し、図１は金型分割面の正面図、図
２は他の実施例を示す金型分割面の正面図である。な
お、図３は従来の金型（横置き配置）の金型分割面の正
面図、図４は図３のＡ−Ａ視の縦断面図、図５は従来の
金型（縦置き配置）の金型分割面の正面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show a mold state according to an embodiment of the present invention. FIG. 1 is a front view of a mold division surface, and FIG. 2 is a front view of a mold division surface showing another embodiment. . FIG. 3 is a front view of a mold dividing surface of a conventional mold (horizontal arrangement), FIG. 4 is a longitudinal sectional view taken along line AA of FIG. 3, and FIG. 5 is a conventional mold (vertical arrangement). It is a front view of the metal mold | die division surface.
【０００７】図１に示すように、本発明では、金型１０
に穿設されるインテークマニホールド用低融点合金中子
を鋳造成形する金型キャビティ１０ａは、インテークマ
ニホールド用低融点合金中子を形成する大径のタンク部
Ｔとこれに略直角に分岐して突出した小径の複数個（図
１の実施例では４個）のポート部Ｐとからなる形状を有
しており、タンク部Ｔとポート部Ｐがともに水平面に対
して約４５°に傾斜し、かつ、ポート先端部Ｐａがポー
ト部Ｐとタンク部Ｔの接合部Ｐｂよりも高位置になるよ
う穿設して設ける。As shown in FIG. 1, in the present invention, a mold 10
The mold cavity 10a for casting and molding the low melting point alloy core for the intake manifold, which is formed in the tank, has a large-diameter tank portion T forming the low melting point alloy core for the intake manifold and a branch substantially perpendicular thereto and protrudes therefrom. And a port portion P having a plurality of small diameters (four in the embodiment of FIG. 1). Both the tank portion T and the port portion P are inclined at about 45 ° with respect to a horizontal plane, and The port Pa is provided so as to be higher than the joint Pb between the port P and the tank T.
【０００８】そして、タンク部Ｔの上端よりタンク部Ｔ
の軸線方向に延長したガス抜き通路２０ａを金型１０に
設けるとともに、各々のポート先端部Ｐａよりポート部
Ｐの軸線方向に延長したガス抜き通路２０ｂを金型１０
に設ける。各々のポート先端部Ｐａより金型１０に設け
られるガス抜き通路は、図２のように、ポート部Ｐの軸
線方向に途中まで延長され、その後屈曲し垂直に延長す
るように設けたガス抜き通路２０ｃとしてもよい。[0008] Then, from the upper end of the tank portion T, the tank portion T
The mold 10 is provided with a gas vent passage 20a extending in the axial direction of the mold 10 and the gas vent passage 20b extending in the axial direction of the port portion P from each port tip Pa.
To be provided. As shown in FIG. 2, the gas vent passage provided in the mold 10 from each port tip Pa is extended halfway in the axial direction of the port portion P, and thereafter is provided so as to bend and extend vertically. 20c may be used.
【０００９】溶湯の供給通路であるランナ部Ｒは、タン
ク部Ｔの下方の一端に接続して設ける。もっと、具体的
に言うと、タンク部Ｔの縁端部に設けた幅木（中子とし
て使用する場合の金型係合部分）１２にランナ部Ｒを接
続する。あるいは、タンク部Ｔの側面部下端に接続して
もよい。A runner portion R serving as a supply passage of the molten metal is provided so as to be connected to one lower end of the tank portion T. More specifically, the runner R is connected to a skirting board (a mold engaging portion when used as a core) 12 provided at an edge of the tank T. Alternatively, it may be connected to the lower end of the side portion of the tank portion T.
【００１０】このように構成された金型キャビティ１０
ａを備えた金型１０を有するダイカストマシンにより、
ガス抜き通路２０ａ、２０ｂまたは２０ｃより金型キャ
ビティ１０ａ内のガスを吸引しながら、たとえば、Ｓｎ
−Ｂｉ合金のような低融点合金の溶湯を型締した両金型
間の金型キャビティ１０ａへ射出した後加圧して鋳造
し、冷却後型開して成形品を取り出す。本発明において
は、金型キャビティ１０ａのタンク部Ｔとポート部Ｐが
ともに水平方向に対して傾斜した状態（傾斜配置）で溶
湯が射出されるため、横置き配置のように湯皺や湯境が
なく、また、縦置き配置に比べてエア溜まりやガス巻き
込みが起こりにくく、鋳巣や湯回り不良の発生が起こり
にくい。The thus-configured mold cavity 10
a by a die casting machine having a mold 10 with
While sucking the gas in the mold cavity 10a from the gas vent passages 20a, 20b or 20c, for example, Sn
A molten metal of a low melting point alloy such as a Bi alloy is injected into the mold cavity 10a between the clamped molds, and then cast under pressure, and after cooling, the mold is opened and a molded product is taken out. In the present invention, the molten metal is injected in a state in which both the tank portion T and the port portion P of the mold cavity 10a are inclined with respect to the horizontal direction (inclination arrangement). In addition, air pools and gas entrapment are less likely to occur than in the vertical arrangement, and the occurrence of casting cavities and poor run-off is less likely to occur.
【００１１】[0011]
【発明の効果】以上述べたように、本発明のインテーク
マニホールド用低融点合金中子の鋳造方法においては、
金型キャビティ内の溶湯流れが円滑に進行し、流れ方向
の急変が緩和され、エア溜まりやガス巻き込みの発生が
少なくなり、湯皺や湯境の発生を防止できるので、良好
な品質の鋳造品が得られる。As described above, in the method of casting a low melting point alloy core for an intake manifold according to the present invention,
The flow of the molten metal in the mold cavity proceeds smoothly, sudden changes in the flow direction are mitigated, the occurrence of air accumulation and gas entrapment is reduced, and the occurrence of hot wrinkles and hot water boundaries can be prevented. Is obtained.
【図１】本発明の実施例に係る金型の金型分割面の正面
図である。FIG. 1 is a front view of a mold dividing surface of a mold according to an embodiment of the present invention.
【図２】本発明の他の実施例に係る金型の金型分割面の
正面図である。側面図である。FIG. 2 is a front view of a mold division surface of a mold according to another embodiment of the present invention. It is a side view.
【図３】従来の金型（横置き配置）の金型分割面の正面
図である。FIG. 3 is a front view of a mold dividing surface of a conventional mold (horizontal arrangement).
【図４】図３のＡ−Ａ視の縦断面図である。FIG. 4 is a vertical sectional view taken along line AA of FIG. 3;
【図５】従来の金型（縦置き配置）の金型分割面の正面
図である。FIG. 5 is a front view of a mold dividing surface of a conventional mold (vertical arrangement).
１０ 金型 １０Ａ 固定金型 １０Ｂ 可動金型 １０ａ 金型キャビティ １２ 幅木 ２０ ガス抜き通路 ２０ａ ガス抜き通路（タンク部） ２０ｂ ガス抜き通路（ポート部） ２０ｃ ガス抜き通路（ポート部） Ｐ ポート部 Ｔ タンク部 Ｒ ランナ部 Reference Signs List 10 mold 10A fixed mold 10B movable mold 10a mold cavity 12 baseboard 20 gas vent passage 20a gas vent passage (tank portion) 20b gas vent passage (port portion) 20c gas vent passage (port portion) P port portion T Tank part R Runner part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 檀浦 貞行 山口県宇部市大字小串字沖の山1980番地 宇部興産株式会社機械・エンジニアリング 事業本部内 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Sadayuki Danura 1980, Kogushi-jiki-oki, Obe-shi, Ube-shi, Yamaguchi Ube Industries, Ltd. Machinery and Engineering Division
Claims (2)
大径のタンク部と該タンク部側面より略直角に分岐して
突出した小径の複数個のポート部とからなる形状を有す
るインテークマニホールドを樹脂材料で射出成形する際
に使用するインテークマニホールド用低融点合金中子の
鋳造方法であって、 型締装置に取り付けた金型装置の両金型を、垂直な分割
面で分離した左右一対の金型で形成された横型締竪鋳込
型とし、 該両金型に設けられた前記中子の金型キャビティを該分
割面に対して該中子のポート部を水平方向に対して傾斜
し、かつ、ポート先端部がポート部とタンク部の接合部
よりも高位置になるよう穿設して設け、 該ポート先端部の各々にそれぞれ接続して設けられたガ
ス抜き通路を介して、ガスを吸引するとともに、 該タンク部の下方の一端より低融点合金の溶湯を射出・
加圧するインテークマニホールド用低融点合金中子の鋳
造方法。1. An intake manifold having a shape comprising a large-diameter tank for injecting gasoline into an automobile engine and a plurality of small-diameter ports protruding from a side surface of the tank at a substantially right angle. A method of casting a low-melting alloy core for an intake manifold used in injection molding with a mold, wherein a pair of right and left dies are separated by a vertical dividing surface, both dies of a die device attached to a mold clamping device. The horizontal mold vertical casting mold formed by the above, the mold cavity of the core provided in the both molds, the port portion of the core is inclined with respect to the dividing surface with respect to the horizontal direction, and Gas is sucked through gas vent passages provided in connection with each of the port tip portions so that the port tip portions are higher than the junction between the port portion and the tank portion. And the tank Injection the melt of the low melting point alloy from one end of the lower-
A method for casting a low-melting alloy core for an intake manifold to be pressurized.
抜き通路を設け、ポート先端部に接続して設けられる金
型のガス抜き通路は、該ポート部の軸線方向に沿って直
進させるか、もしくは、該ポート部の軸線方向に沿って
いくらか直進させた後に鉛直上方へ屈曲させたガス抜き
通路とした請求項１記載のインテークマニホールド用低
融点合金中子の鋳造方法。2. A mold gas vent passage connected to the upper end of the tank portion is provided, and the mold gas vent passage provided to be connected to the tip of the port moves straight along the axial direction of the port portion. 2. The method for casting a low melting point alloy core for an intake manifold according to claim 1, wherein the gas vent passage is formed so that the gas vent passage is formed so that the gas vent passage is formed so as to extend straightly along the axial direction of the port portion and then bend vertically upward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2547897A JPH10216917A (en) | 1997-02-07 | 1997-02-07 | Method for casting low melting point alloy core for intake manifold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2547897A JPH10216917A (en) | 1997-02-07 | 1997-02-07 | Method for casting low melting point alloy core for intake manifold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10216917A true JPH10216917A (en) | 1998-08-18 |
Family
ID=12167165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2547897A Pending JPH10216917A (en) | 1997-02-07 | 1997-02-07 | Method for casting low melting point alloy core for intake manifold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10216917A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007010181A2 (en) * | 2005-07-19 | 2007-01-25 | Cummins Turbo Technologies Limited | Method and apparatus for manufacturing turbine or compressor wheels |
| JP2009248174A (en) * | 2008-04-10 | 2009-10-29 | Toshiba Mach Co Ltd | Molding machine |
| JP2012166221A (en) * | 2011-02-14 | 2012-09-06 | Honda Motor Co Ltd | Casting die |
-
1997
- 1997-02-07 JP JP2547897A patent/JPH10216917A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007010181A2 (en) * | 2005-07-19 | 2007-01-25 | Cummins Turbo Technologies Limited | Method and apparatus for manufacturing turbine or compressor wheels |
| WO2007010181A3 (en) * | 2005-07-19 | 2007-08-16 | Cummins Turbo Tech Ltd | Method and apparatus for manufacturing turbine or compressor wheels |
| US8464777B2 (en) | 2005-07-19 | 2013-06-18 | Cummins Turbo Technologies Limited | Method and apparatus for manufacturing turbine or compressor wheels |
| JP2009248174A (en) * | 2008-04-10 | 2009-10-29 | Toshiba Mach Co Ltd | Molding machine |
| JP2012166221A (en) * | 2011-02-14 | 2012-09-06 | Honda Motor Co Ltd | Casting die |
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